javbus find copy

主帖、楼层、楼层评论中发现番号即生成复制按钮
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// ==UserScript==
// @name         javbus find copy
// @namespace    http://tampermonkey.net/
// @version      0.3
// @description  主帖、楼层、楼层评论中发现番号即生成复制按钮
// @match        https://www.javbus.com/forum/*
// @license      zxuuhh
// @grant        none
// ==/UserScript==

(function () {
  'use strict';

  const CODE_REGEX = /\b([A-Z]{2,6}-?\d{3,5})\b/g;

  function createCopyBtn(code) {
    const btn = document.createElement('span');
    btn.textContent = ' [复制]';
    btn.style.cssText = `
      color:#337ab7;
      cursor:pointer;
      font-size:17px;
      user-select:none;
    `;
    btn.addEventListener('click', () => {
      navigator.clipboard.writeText(code);
      btn.textContent = ' [已复制]';
      setTimeout(() => (btn.textContent = ' [复制]'), 1000);
    });
    return btn;
  }

  function processTextNode(textNode) {
    const text = textNode.nodeValue;
    if (!CODE_REGEX.test(text)) return;

    CODE_REGEX.lastIndex = 0;

    const frag = document.createDocumentFragment();
    let lastIndex = 0;
    let match;

    while ((match = CODE_REGEX.exec(text))) {
      const code = match[1];

      frag.appendChild(
        document.createTextNode(text.slice(lastIndex, match.index))
      );

      frag.appendChild(document.createTextNode(code));
      frag.appendChild(createCopyBtn(code));

      lastIndex = match.index + code.length;
    }

    frag.appendChild(
      document.createTextNode(text.slice(lastIndex))
    );

    textNode.parentNode.replaceChild(frag, textNode);
  }

  function scanContainer(container) {
    if (container.dataset.scanned) return;
    container.dataset.scanned = '1';

    const walker = document.createTreeWalker(
      container,
      NodeFilter.SHOW_TEXT,
      null,
      false
    );

    const nodes = [];
    let node;
    while ((node = walker.nextNode())) {
      nodes.push(node);
    }

    nodes.forEach(processTextNode);
  }

  function scanAll() {
    document
      .querySelectorAll('td.t_f, div.psti')
      .forEach(scanContainer);
  }

  setInterval(scanAll, 500);
})();